长时间（p = 61.8-d）m5v矮人从苔丝和NGTS中黯然失色

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长时间（p = 61.8-d）m5v矮人从苔丝和NGTS中黯然失色

A long period (P = 61.8-d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS

论文作者

Gill, Samuel, Cooke, Benjamin F., Bayliss, Daniel, Nielson, Louise D., Lendl, Monika, Wheatley, Peter J., Anderson, David R., Moyano, Maximiliano, Bryant, Edward M., Acton, Jack S., Belardi, Claudia, Bouchy, Francois, Burleigh, Matthew R., Casewell, Sarah L., Chausev, Alexander, Goad, Michael R., Jackman, James A. G., Jenkins, James S., McCormac, James, Gunther, Maximilian N., Osborn, Hugh P., Pollaco, Don, Raynard, Liam, Smith, Alexis M. S., Tillbrook, Rosanna H., Turner, Oliver, Udry, Stephane, Vines, Jose I., Watson, Christopher A., West, Richard G.

论文摘要

过境外行星调查卫星（TESS）生产了大量的单人类事件候选者，这些事件正在由下一代运输调查（NGTS）监控。我们观察到TIC-231005575系统的第二个时期（TMAG = 12.06，TEFF = 5500 +-85 K），带有NGTS和带有LAS Cumbres天文台（LCO）望远镜的第三个时期，南非在南非限制了Orbital时期（P = 61.777 D）。随后使用Coralie进行的径向速度测量结果表明，过境对象的质量为M2 = 0.128 +-0.003 M $ _ \ ODOT $，表明该系统是G-M二进制。次级的半径为r2 = 0.154 +-0.008 r $ _ \ odot $，并且与恒星进化的模型一致，比1- $σ$更好。

The Transiting Exoplanet Survey Satellite (TESS) has produced a large number of single transit event candidates which are being monitored by the Next Generation Transit Survey (NGTS). We observed a second epoch for the TIC-231005575 system (Tmag = 12.06, Teff = 5500 +- 85 K) with NGTS and a third epoch with Las Cumbres Observatory's (LCO) telescope in South Africa to constrain the orbital period (P = 61.777 d). Subsequent radial velocity measurements with CORALIE revealed the transiting object has a mass of M2 = 0.128 +- 0.003 M$_\odot$, indicating the system is a G-M binary. The radius of the secondary is R2 = 0.154 +- 0.008 R$_\odot$ and is consistent with models of stellar evolution to better than 1-$σ$.

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